Percona server won't restar after datadir change

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http://serverfault.com – I installed percona from percona repository on a ubuntu 12.04 server which has a solid state drive. I thought i would rather put the datadir on the Solid state drive and put partition on normal sata drive. below are my settings essentially a copy of my-large.cnf to which i added the datadir and log file in order to see what was failing the starting of the server: [mysqld] port = 3306 socket = /var/run/mysqld/mysqld.sock datadir = /mnt/disk2/mysqldata general-log-file= /var/log/mysql.log log-error = /var/log/mysql-error.log skip-external-locking after enabli (HowTos)